Wide bandgap bipolar turn-off thyristor having non-negative temperature coefficient and related control circuits
First Claim
1. An electronic device, comprising:
- a wide bandgap thyristor having an anode terminal, a cathode terminal, and a gate terminal; and
a wide bandgap bipolar transistor having a base terminal, a collector terminal, and an emitter terminal, the emitter terminal of the bipolar transistor being coupled to the anode terminal of the thyristor,wherein at least one of the bipolar transistor and the thyristor is selected such that, as an operating temperature increases, an increase in an on-resistance between the collector and emitter terminals of the bipolar transistor is greater than or substantially equal to a decrease in an on-resistance between the anode and cathode terminals of the thyristor.
2 Assignments
0 Petitions
Accused Products
Abstract
An electronic device includes a wide bandgap thyristor having an anode, a cathode, and a gate terminal, and a wide bandgap bipolar transistor having a base, a collector, and an emitter terminal. The emitter terminal of the bipolar transistor is directly coupled to the anode terminal of the thyristor such that the bipolar transistor and the thyristor are connected in series. The bipolar transistor and the thyristor define a wide bandgap bipolar power switching device that is configured to switch between a nonconducting state and a conducting state that allows current flow between a first main terminal corresponding to the collector terminal of the bipolar transistor and a second main terminal corresponding to the cathode terminal of the thyristor responsive to application of a first control signal to the base terminal of the bipolar transistor and responsive to application of a second control signal to the gate terminal of the thyristor. Related control circuits are also discussed.
204 Citations
19 Claims
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1. An electronic device, comprising:
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a wide bandgap thyristor having an anode terminal, a cathode terminal, and a gate terminal; and a wide bandgap bipolar transistor having a base terminal, a collector terminal, and an emitter terminal, the emitter terminal of the bipolar transistor being coupled to the anode terminal of the thyristor, wherein at least one of the bipolar transistor and the thyristor is selected such that, as an operating temperature increases, an increase in an on-resistance between the collector and emitter terminals of the bipolar transistor is greater than or substantially equal to a decrease in an on-resistance between the anode and cathode terminals of the thyristor.
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2. An electronic device, comprising:
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a wide bandgap thyristor having an anode terminal, a cathode terminal, and a gate terminal; a wide bandgap bipolar transistor having a base terminal, a collector terminal, and an emitter terminal, the emitter terminal of the bipolar transistor being coupled to the anode terminal of the thyristor, wherein the bipolar transistor and the thyristor define a wide bandgap bipolar power switching device; and a control circuit configured to generate first and second control signals, supply the second control signal to the gate terminal of the thyristor and supply the first control signal to the base terminal of the bipolar transistor to switch the bipolar power switching device to a conducting state such that a load current flows between the collector terminal of the bipolar transistor and the cathode terminal of the thyristor, wherein the control circuit is further configured to couple the gate terminal of the thyristor to the collector terminal of the bipolar transistor such that the load current is commutated to the gate terminal of the thyristor to switch the bipolar power switching device to a nonconducting state. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A packaged bipolar turn-off thyristor device, comprising:
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a wide bandgap gate turn-off thyristor (GTO) having an anode terminal, a cathode terminal, and a gate terminal; and a wide bandgap bipolar junction transistor (BJT) having a base terminal, a collector terminal, and an emitter terminal, the emitter terminal of the BJT being directly coupled to the anode terminal of the GTO, wherein an on-resistance between the anode and cathode terminals of the GTO decreases as an operating temperature of the GTO increases, wherein an on-resistance between the collector and emitter terminals of the BJT increases as an operating temperature of the BJT increases, and wherein at least one of the BJT and the GTO is selected such that the increase in the on-resistance of the BJT is greater than or substantially equal to the decrease in the on-resistance of the GTO. - View Dependent Claims (17, 18, 19)
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Specification